Stop-block for vehicles.



H. OARDUGK & J. MATTES.

STOP BLOCK FOR VEHICLES.

APPLICATION FILED AUG. 26, 1913.

Patented Dec. 9, 1913.

l V/f/rewes: W WI i5.

COLUA\Hh PLANOGRAPH CO WASHINDTON, n. c.

"outrun STATES PATENT OFFICE.

HEINRICH GARDUCK, 0F SAARBRT TCKEN, AND JAGOIB MAT'IES, OF BREIBACH-ON-THE fiAAR, GERMANY.

s'ror-nnoen non vnnrcnns.

LOSLZUS.

Application filed August 26, 1913.

Specification of Letters Patent.

Patented Dec. 9, 1913. Serial No. 786,761.

To all whom it may concern Be it known that we, Huiivmcii Gammon, civil engineer, of 109 ldainzerstrasse, in the city of Saarbriiclien, Germany, and Jaoon Miwrns, civil engineer, of Brebach-on-the- Saar, Germany, both subjects of the Gern'ian Emperor, have invented new and useful Improvements in Stop-Blocks for Vehicles, of which the following is a specification.

This invention relates to a throw off device for step blocks for vehicles, and its object is to automatically remove the stop block from the line after the braking of the vehicle has been etl ected.

According to the invention, the device contains a spring capable of protruding through the sole of the brake shoe, and a pivoted arm adapted to receive the wheel of the vehicle and to act as a resistance piece for the spring. This arm is depressed by the wheel of the vehicle whereby the spring is compressed. in this depressed condition the pivoted arm is locked by means of a suit ably constructed catch handle. l Vhen the weight of the wheel is removed from the said arm the spring, which has hitherto been in a condition of tension, is released and pro trudes through the sole of the brake shoe thereby lifting the latter from the line and throwing it to one side.

The invention will be described more particularly with reference to the accompanying drawings in which Figure l is a longitudinal section of the stop block in its operative position. Fig. 2 shows it in its braking position. Fig. is a longitudinal section of the stop block in process of being thrown cit the line, and in Fig. 41- the handle is shown locked so that the throw off device is non-operative.

in the main body 1 oi the stop block, the pivoted arm 2 is inovably disposed on the pivot 3; a cup shaped spring retainer (5 is horizontally placed over an opening in the sole of the brake shoe, the said part 6 being actuated by the spring l. One end of this spring is fixed to the cup 6, while the other end impinges from below on to the pivoted arm 2. The lever shaped handle 5 which is movably secured on the pivot 8, is constructed like a pawl, and adapted by means of a dog to lock the arm 2 when the latter is depressed by means of the vehicle.

In operation the stop block with its sole is placed. on the line. The vehicle in mounting the block depresses the pivot arm 2, whereby the spring 4 is compressed (Fig. 2) at the same time the handle falls by means of its own weight, and locks the said arm 2. After the vehicle has been stopped it rolls back off the block, and the spring 4, which owing to the locking of the arm 2 is unable to expand upward, releases itseli in a downward direction and depresses the cup shaped member 6 through the opening in the sole ot the block (ilig. In this manner the block is raised and thrown on. one side.

As shown in Fig. i, the handle 5 can by means of a stop pin 7 be held so as not to engage the pivoted arm 2, and the throw otl' device thereby being rendered inoperative, and the stop block is then changed into an ordinary one piece stop block.

Having now particularly described and ascertained the nature of our said invention, and in what manner the same is to be performed, we declare that what we claim is 1. A. throw off device for vehicle stop blocks, having a pivoted arm adapted to compress a spring by means oi the weight of the vehicle, and a locking device for holding said arm in a depressed position against the pressure of said spring, which on the weight being removed from the stop block, expands toward the rail and causes a cup shaped. spring retainer to protrude beneath the sole of the block, thereby raising same trom the rail and throwing it aside, substantially as described.

2. A vehicle stop block provided with an opening in the sole thereof, a cup fitted to slide in the opening, an arm pivoted in the block, aspring arranged between said. cup and arm adapted to normally maintain the latter in extended position to be encountered and depressed by the vehicle wheel, a grav ity pawl pivoted in the block above said arm and coilperating with the latter to retain the same in retracted position when the weight is removed whereby the spring may ect the cup to raise the block and throw same aside.

8. A vehicle stop block provided with an opening in the sole thereof, a cup slidably fitted in the opening, an arm pivoted in the block, a spring arranged between said cup and arm for normally maintaining the latter in an extended position to be encountered in presence of tWo Witnesses, this twelfth and depressed by the vehicle Wheel, a pawl day of August 1913.

pivoted in the block and adapted to engage said arm and retain the same in retracted HEINRICH GABDUGK' position, and means for holding said pawl v JACOB MATTES' out of operative engagement with said arm. Witnesses:

In testimony, that We claim the foregoing JOSEPH PFEIFFER, as our invention, We have signed our names WILHELM TRAUTZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

